Punching machine



March 12, 1929.

P. A. JUUL PUNCHING MACHINE Filed NOV. 22. 1926 v m z www l 5 @www 5FX01 l 1 5 Patented Mar. 12, 1929.

UNITED STATES PATENT oFFlcE.

PETER A. J'UUL, OF CHICAGO, ILLINOIS, ASSIGNOB TO LATHAM MACHINERY COH-PANY, A CORPORATION OF ILLINOIS.

PUNCHIN G MACHINE.

Application tiled November 22, 1926. Serial No. 149,835.

This invention relates to a punch, and more particularly to a quickdetachable and adjustable` unch block and guide.

One of t e objects of the present invention is to provide a of a quickdetachable punch block and guide which can be easily and securelymounted in or detached from the bed or frame of the unch.

1o A further object of the invention is to provide a novel and improvedform of punch block which is simple in construction and is provided withmeans which engage the bevelled finished surface of the be or frame ofthe punch for securel fastening the punch in various positions oadjustment in the bed or frame.

A still further object of the invention is to provide a novel and-improved form of guide which may be quickly and readily adjusted withinthe bed or frame and is rovided with means for automatically locking theguide in various positions of adjustment.

These and other objects are accomplished by providing construction andarran ement 0f the various parts in the manner ereinafter described andparticularly pointed o ut in the appended claims.

Referring to the drawings,

Figure 1 is a fragmentary cross-sectional view showing a fragmentaryportion of a punch, which includes the head and bed or frame having myimproved punch block mounted therein;

Figure 2 is an enlarged side elevational view of my improved unch block,showing a portion of the punch d or frame in crosssection;

Figure 3 is a top plan view showing a fragmentary portion of the bed orframe having my improved punch block and guide mounted therein;

Figure 4 is a cross-sectional view of a portion of the punch bed orframe showing my improved form of guide mounted therein, with the sameshown partly in cross-section;

Figure 5 is a side elevational view of a modified form of securing meansfor locking the punch block in the bed or frame, and,

novel and improved forml 4with a Fi re 6 is a rear elevational view ofthe punc block shown in Figure 5.

In illustrating one embodiment of myinvention, I have shown the same inconnection unch which consistsv of the usual bed or rame 10 supported onside frame members 11. The bed or frame 10 is provided with the usuallongitudinally extendmg channel 12, which is formed by the inclined orbevelled finished surfaces 13 and 14 so as to formsubstantially adove-shaped channel throughout the entire length of the bed or frame:The bed or frame is further provided with spaced apart finished surfaces15. Secured to the forward end of the bed or frame adjacent the frontbevelled surface 14 is the usual scale 16 and table 17. Operablyconnected with the punch in a manner well understood in the art is theusual reciprocating head 18, which in turn is provided with a downwardlyextending reverse L-shaped finished portion 19 for engaging the punch inthe manner hereinafter described. rlhis reverse L-shaped portion 19extends longitudinally across the head of the punch and permits theengagement of the plunger so that the same may be adjusted 1n variouspositions across the punch head.

One of the essential features of m invention is the provision of a novelorm of punch block, which cannot only be readily adjustedl within thebed or frame of the punch, but which at the same time can be quicklydetached and removed from the bed orframe with the reciprocting plungerrmly secured in the bed or ame in such a manner that the accidentalmovement of the punch block with respect to the bed or frame 1sprevented.

My improved punch block, as shown at 20, comprises a base or frameengaging portion 21, which is provided with a forward tapered finishedportion 22, which en ages the inclined or bevelled portion 14 o the bedor frame 10 when the finished or bottom surface 23 is seated on thefinished surfaces 15 of the bed or frame. The punclif block 20 isprovided `with a reciprocating plunger supporting portion 24, which inturn is provided with a vertically extending bore 25. Mounted within thebore is a reciprocating plunger 26. The reciprocating plunger' 26 isprovided with a hardened punch 2,7 mounted in a. longitlulinallyextending socket formed in the plunger. The base 2l of the block 2() isprovided with a die 28, which in turn is provided with an aperture 29for receiving the punch 27 therein. Located below thc aperture 29 andconeentrically therewith is a bore 30 which extends through the baseportion 21 of the block for permitting the punched material to bedropped therethrough.

My improved means for securely fastening the punch block to the bedscomprises a locking pin 31 which is cylindrical in shape and of a widthsubstantially the width of the punch block. Extending through thediametral center of the locking pin 31 is a threaded bore 32, in whichis mounted a threaded thumb screw 33. The thumb screw7 33 is looselymounted in a vertically extending bore 34 mounted in a rear extension 35of the block 20. The rear end of the block 20 is provided with abevelled surface 36 which assumes an angle of substantially 60 degreeswith respect to the horizontal and is positioned with respect to thebevelled surface 13 of the bed so that the locking pin 3l formssubstantially a wedge and securely locks the block 20 when the thumbscrew is turned in a direction to draw the locking pin upwardly withrespect to the block.

With this construction it will readily be seen that by having thelocking pin 31 of substantially the same width as the block 20, thecurved surfaces of the locking pin afford a large locking or wedgingsurface between the inclined wall 13 of the bed and the inclined wall 36of the block, thereby positively assuring a rigid clamping t so as toprevent any accidental movement of the block after once the thumb screw33 has been securely tightened. Atthe same time, it will be noted that afew turns of the thumb screw will release the locking pins against thesurfaces and permit the ready removal of the block from the bed or frameof the punch.

In order to further' facilitate the removal of the block from the bed orframe so that additional blocks may be inserted, or if necessityrequires certain blocks to be removed, I have provided a novel form ofplunger which has its upper portion provided with a transverse slot asshown at 37 forming substantially an overhanging Hange 38. The flattenedslot 37 on the plunger is adapted to engage the forwardly projectingportion 19 on the head 18 so that the plunger is prevented fromrevolving when the block is secured in the bed or frame. Thisconstruction also permits the blocks to be inserted or of time.

In the modicd form of my inventiory shown in Figure 6, I have shown alocking in 39 which is reciprocally mounted in a ore 40 which extendslongitudinally in the rear end of the beds 21 of the block 20. This pin39 is provided with a bevelled or conically shaped bore 41, which isadapted to engage the bevelled or conically shaped end 42 of a thumbscrew 43, the thumb screw 43 being mounted in threaded engagement withthe bore 44 formed in the tail end 35 of the block 20. The threaded bore44 in the block 20 is arranged at right angles with respect to the bore40 so that the ta ered or conically shaped portion 42 of t e thumb screw43 is adapted to engage the conically shaped concavity or aperture 41 inthe pin 39. The rear end of the pin 39 is bevelled as shown at 45, so asto engage the bevelled portion 13 of the bed or frame 10.

From the above description it will be seen that as the thumb screw isadjusted downwardly with respect to the block, the conically shapedportion 42 of the thumb screw 43 engages the conically-shaped concavity41 in the pin 39 and forces the same outwardly with respect to the blockso that the inclined surfaces 45 of the locking pin 39 engage theinclined surface 13 of the bed and thereby clamp the block in the bed orframe and secures it from removal therefrom.

With this construction it will readily be seen that I have not onlyprovided a construction which securely fastens the punch block to thebed or frame of the punch, but one in which additional punch blocks maybe quickly inserted in or removed from the bed or frame.

Another important feature of my invention is the provision of a novelform of guide which may be removed or adjusted and which at the sametime automatically locks itself in the bed or frame of the punch. Thiscomprises a block 46 which is provided with a. rearwardly taperedportion 47, which in turn is adapted to engage the rearward tapered wall13 of the bed or frame. The forward end of the guide block 46 isslightly curved, as shown at 48, in a direction reverse to the taperedwall 14 of the forward wall of the bed or frame 10. Located in theforward end of the guide block 46 in a longitudinally extending bore orsocket 49 is a ball 50. Mounted between the ball 50 and the base of thesocket 49 is a compression spring 51 which normally forces the yballoutwardlyv with respect to the guide block 46. In order to prevent theball from being discharged from the socket 49, I have upset the materialas shown at 52 so that only a portion of ball 50 pro trades from theouter end of the socket 49. Mounted on top of the guide block 4G is aback gauge 53, which in turn is provided with a longitm'linallyextending slot 54 and overhanging flanges 55 which engage the oppositesides of the block. T he back gauge may be adjusted longitudinally withrespect to the block by means of a bolt 5G which is mounted in athreaded bore 57 of the block 46.

From the above description it will be seen that the guide block may beadjusted longitudinally within the bed or frame ot' the punch to variouspositions of adjustment, or may be readily removed from the bed or frameby merely withdrawing it from the channel formed in the bed or frame.

It will also be noted that when the gauge block is inserted in itsnorma-l operative position in the bed or frame, the spring actul atedball 50 automatically locks the gauge block when thus inserted.

While inthe above specification I have described one embodiment of onemodification of my invention, it will of course be understood that thesame is capable of further modification without departing from thespirit and vscope of the invention as defined bv the following claims.

What I claim as my invention and desire. Y to secure by Letters Patentis:

1. In combination with a punching ma@ chine, a frame having alongitudinally extending channel formed therein, the walls ofsaid'channel inclined at anangle with respect to the vertical, apunching block mounted in said channel and having its front end engagingone of the inclined walls of said channel, said block having an inclinedwall, and means slidably mounted on the inclined wall of said block andengageable with the other inclined wall of the channel, for detachablysecuring said block to said frame.

ably securin 2. In combination with a punching machine, a frame having alongitudinally eX- tending channel formed therein, the walls of saidchannel inclined at an angle with respect to the vertical, a punchingblock mounted in said channel and having its frontend engaging one ofthe inclined Walls of said channel, a threaded member mounted on oneendof said block, and an adjustable locking pin supported on saidthreaded member and engageable with the other of said inclined walls otsaid channel for detachsaid block to said frame.

3. In com ination with a punching machine, a frame having alongitudinally eX- tending channel formed therein, siid channel formedby upwardly incli ed walls, a block mounted in said chan el having itsforward end engageable with one of the inclined walls of said channel,an adjustable member mounted on one end of said block, a

other inclined wall of said channel'for detachably fastening said blockto said frame.v

4. In combination with a punching machine, a frame having alongitudinally extending channel :tormed therein, said channel formed-by upwardly inclined walls, a block mounted in said channel having litsforward end engageable with one ofthe inclined walls of said channel, alocking member and a Ithreaded member mounted in said block having saidlocking member suspended therefrom, said locking pin being engageablewith one of the inclined Walls o'said block for adjusting said lockingmember for detachably securing said block to said frame.

5. Inl ,combination with a punching machine'f'a frame thereforhaving alongltudinally extending channel therein, said channel formed byupwardly inclined walls, a

-punching block mounted in said channel having one end thereof engagingone of said lnclined walls, a threaded member carried by the other endot said block, and a locking -pin mounted on and in threaded engagementwith said threaded member and en g'ageable with the other inclinedsurface of j ber carried by said block andin threadedv engagement withsaid locking'pin for moving said pin to detachably secure said block tosaid frame.

7. In combination with a punching machine, a frame having alongitudinally extending channel formed therein, said channel formed byhaving upwardly inclined Walls, a punching block mounted in said channeland having one end thereof engageable with one of said inclined walls, athreaded member mounted in the other end of said block, and a lockingpin in threaded engagement with said threaded member and engageable withthe other bevelled wall of said channel for detachably securing saidblock to said frame.

8. In combination with a punching machine, a frame having alongitudinally extending channel formed therein, the' opposite walls ofsaid' channel converging toward each other at the upper end thereof, apunching block mounted in said channel, having one end engageable withone of said inclined walls,- the other end of said block being protheother bevelled wall of said'channel for vided with an inclined bevelledsurface.I a detachably fastening said block to said threaded memberextending through an aperframe.

ture in said block adjacent said-inclined wall, In testimony whereof Ihave signed my 5 and a llocking pin in threaded engagement name to thisspecication.

'with saidv threaded member and enga eable with the bevelled surface ofsaid bloc and `PETER A. JYUUL.

